fefel



(N0 ModelQ) 2 Sheets-Sheet 1.

J. E. PEPEL. v LOOPER OPERATING MECHANISM FOR SEWING MACHINES.

No. 595,615. Patented Dec. 14, 1897.

WITNESSES:

(No Model.)

2 Sheets-Sheet 2. I J. E. IEFEL. LOOPER OPERATING MECHANISM FOR SEWING MACHINES.

N0. 595,615- Patented Dec. 14, 1897..

. N. a R

UNITED STATES PATENT OFFICE.

JOHN E. FEFE-L, OF NEW YORK, N. Y.

LOOPER-OPERATING MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 595,615, dated December 14, 1897.

Application filed January 14, 1897. Serial No. 619,144. (No model.)

To all whom it may concern.-

Be it known that I, J OHN E. FEFEL, a citizen of the United States, and a resident of New York, in the county and State of New York, have invented certain new and useful Improvements in SeWing-Machines, of which the following is a specification.

My invention relates to that class of sewing-machines in which a thread-carrying looper is used in cooperation with an ordinary piercing-needle to produce a double-loop lockstitch -such as, for instance, the well-known Grover 8: Baker double loop stitchand stitches of a kindred nature.

My invention consists, chiefly, of an improved form of looper mechanism applicable to all machines of this character, which mechanism is of few parts and of simple construction, my object being to cheapen the cost of manufacture and at the same time preserve the efliciency and the strength and rigidity so essential in high-speed sewing-machines.

In the drawings, Figure 1 is a side elevation, partly in section. Fig. 1 is a plan of the looper detached. Fig. 2 is a section on line a: as of Fig. 1, looking toward the left. Fig. 3 is a section on line y y of Fig. 1, looking toward the right. Figs. 4, 5, 6, 7, and 8 are details illustrating the formation of the stitch, and Fig. 9 is a sectional view showing the completed stitch.

Referring to the drawings by letters and figures, A represents a main driving-shaft, and B a lever pivoted at b and connected at b with the main shaft bymeans of the eccentric and eccentric-rod O and C, respectively. The lever B consists of two arms 19 and b the former connected with and operating the needle-bar D, as clearly indicated in the drawings, and the latter connected with and operating my improved looper mechanism through the medium of a suitable connecting-rod. The shaft A is'also provided with a cam or eccentric, (shown at a.)

The looper device is located below the sewing-plate E and consists of the horizontal looper bar or carriage F and the looper proper, G, fixedly secured thereto. The looper bar or carriage is preferably a cylindrical body mounted in the guides or bearings K in the standards K and adapted to oscillate and to move longitudinally therein. The looper-bar is further provided with a forked extension f, embracing the elongated cam or eccentric a on the driving-shaft, and a rod J, equipped with ball-joints j and connecting the looper bar or carriage with the end of the lever b In Fig. 1 I have shown the needle in its lowest position, with the looper standing to the right and adjacent thereto. In this position it will be seen that rotation of the shaft A, and the consequent operation of the lever B, causes the looper bar or carriage to move to the left. At the same time the carriage is slightly rocked by the action of the cam a upon the extension f, which causes the looper G in moving to the left to pass to the rear of the needle 01. The needle is meanwhile rising, and when clear of the looper the cam or eccentric a again acts and the looper is thrown in the opposite direction-that is, forward. The needle now descends, and the looper moving to the right passes in front of the needle (1.

The dotted lines Z in Fig. 1 indicate the path taken by the looper in this operation. As the forked extension makes contact with the cam or eccentric at diametrically opposite points oscillatory motion is positively transmitted to the cylindrical looper bar, while at the same time the said extension is perfectly free to slide longitudinally over the surface of the cam or eccentric, which is made of sufficient length to accommodate such longitudinal movement.

In Figs. 4, 5, 6, 7, and 8 I have shown how the stitch is formed. m and n represent two pieces of material to be sewed together. l

the left and passes between the needle 01 and its thread Z in the rear of the needle. The needle ascends, leaving a turn 3 around the looper. The looper contin uingits movement to the left sets the previously-formed looperstitch, is tilted forward, and begins its return to the right, carrying therewith the loop 3, and the now descending needle passes between the rear of the looper and its thread 2. The looper continuing its movement to the right leaves a turn 4 around the needle and frees the needle-loop 3, while the farther descent of the needle draws this loop close up to the work and sets the stitch. The looper is then tilted rearwardly, and the above operation repeated.

I prefer to provide the under side of the looper G with the slightly-inclined face indicated at g. This forms a kind of hook or drag for the loop 3 and serves to carry said loop out of the path of the descending needie before freeing it.

Having described my invention-,1 claim.

In a sewing-machine the combination of a needle and its actuating mechanism, ofa rotating shaft having an elongated. eccentric surface thereon, and a reciprocating cylindrical looper-bar carrying the looper and provided with a laterally-proj ectin g fork embrac- JOHN E. FEFEL.

Witnesses:

HENRY H FEFEL, FRANK S. OBER. 

